CN202882813U - Bypass valve of screw drill - Google Patents
Bypass valve of screw drill Download PDFInfo
- Publication number
- CN202882813U CN202882813U CN 201220594063 CN201220594063U CN202882813U CN 202882813 U CN202882813 U CN 202882813U CN 201220594063 CN201220594063 CN 201220594063 CN 201220594063 U CN201220594063 U CN 201220594063U CN 202882813 U CN202882813 U CN 202882813U
- Authority
- CN
- China
- Prior art keywords
- valve
- ring
- spool
- valve body
- spring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Safety Valves (AREA)
Abstract
A bypass valve of a screw drill comprises a valve body, a retaining ring, a shunt ring, a valve spool, a spring and a sealing ring. An inner cavity of the valve body is provided with a cylindrical channel with steps, and the cylindrical channel is communicated with a bypass port arranged on the side of the valve body. The valve spool is of a cylindrical structure with an internal channel, one end of the cylindrical structure is provided with steps, the valve spool is mounted in the cylindrical channel with the steps in the valve body through the spring and is in seal fit with the valve body through the sealing ring, a valve spool hole is arranged on the lower portion of the valve spool, the shunt ring and the retaining ring are sequentially arranged at the upper end of the valve spool, the retaining ring is connected with the valve body in a threaded manner, the bypass valve is open when the spring returns, and the bypass port is communicated with the valve spool hole. The spring is semi-closed, impurities in mud cannot cause failure of the bypass valve of the screw drill, and compared with the prior art, the bypass valve has the advantages of simple structure, easiness in manufacture, high reliability and the like.
Description
Technical field
The utility model relates to the oil drilling apparatus, is specifically related to a kind of by-pass valve of screwdrill.
Background technology
Being widely used of helicoid hydraulic motor in oil drilling production, by-pass valve of screwdrill are one of parts that form helicoid hydraulic motor, and by-pass valve of screwdrill makes the interior mud of drill string be connected with annular space rising, being in out the position during lower brills.Owing to contain a large amount of impurity in the mud, be easy to be deposited on the spring place of by-pass valve of screwdrill, cause by-pass valve of screwdrill to lose efficacy, whole helicoid hydraulic motor lost efficacy, and had a strong impact on carrying out smoothly of production.
The utility model content
The purpose of this utility model is exactly the defective that exists for prior art, and a kind of by-pass valve of screwdrill is provided.
Its technical scheme is: comprise valve body, back-up ring, flow splitter, spool, spring and sealing ring, body cavity is provided with cylindrical channel with the level, and cylindrical channel is connected with the by-pass port that is located at the valve body sidepiece.Described spool is established passage and end cylindrical structural with the level in being, it, and cooperates with valve seal by sealing ring in valve body in the cylindrical channel with the level by spring fitting, and the bottom of spool is provided with spool bore; Described spool upper end is provided with flow splitter and back-up ring in turn, and back-up ring is connected with valve body screw thread; During described spring reset, bypass valve is in out the position, and by-pass port is connected with spool bore.
Wherein, described flow splitter is circular ring.Described back-up ring is with externally threaded circular ring.
The utility model medi-spring is in semi-closed state, and the impurity in the mud can not cause by-pass valve of screwdrill to lose efficacy, and makes it compared with prior art, have simple in structure, make easily, high reliability.
Description of drawings
Fig. 1 is the structural representation of a kind of embodiment of the utility model.
The specific embodiment
With reference to Fig. 1, a kind of by-pass valve of screwdrill comprises valve body 1, back-up ring 2, flow splitter 3, spool 4, spring 5 and sealing ring 6, and valve body 1 inner chamber is provided with cylindrical channel with the level, and cylindrical channel is connected with the by-pass port 7 that is located at valve body 1 sidepiece.Described spool 4 is established passage and end cylindrical structural with the level in being, it is installed in the valve body 1 interior cylindrical channel with the level by spring 5, and is sealed and matched by sealing ring 6 and valve body 1, and the bottom of spool 4 is provided with spool bore 8; Be provided with in turn flow splitter 3 and back-up ring 2 on the inwall of described spool 4 upper ends, valve body 1, back-up ring 2 is threaded with valve body 1; When described spring 5 resetted, bypass valve was in out the position, and by-pass port 7 is connected with spool bore 8.Wherein, described flow splitter 3 is circular ring, and its external diameter equates that with the internal diameter of valve body 1 cylindrical channel its wall thickness is 2-5mm.Described back-up ring 2 is with externally threaded circular ring.
First spring 5 is put in the valve body 1 during installation, spool 4 is installed again, put at last flow splitter 3, again back-up ring 2 is fixed in the valve body 1 by screw thread.
During work, helicoid hydraulic motor rise, when lower brill or pump pressure are low, pump pressure is not enough to overcome elastic force and the stiction of spring 5, spool 4 is failure to actuate, spool bore 8 on the spool 4 is communicated with by-pass port 7 on the valve body 1, bypass valve is in out the position, and the interior mud of drill string is connected with annular space, and helicoid hydraulic motor is not worked; When pump pressure improves, the power of pump function on spool 4 is greater than elastic force and the stiction of spring 5, spool 4 actions, move downward, the spool bore 8 on the spool 4 staggers with the by-pass port 7 on the valve body 1, is in closed state, bypass valve is in off-position, the interior mud of drill string is not communicated with mutually with annular space, and mud enters screw drilling tool motor, drives helicoid hydraulic motor work.
Claims (3)
1. by-pass valve of screwdrill, comprise valve body, back-up ring, flow splitter, spool, spring and sealing ring, body cavity is provided with cylindrical channel with the level, cylindrical channel is connected with the by-pass port that is located at the valve body sidepiece, it is characterized in that: described spool is established passage and end cylindrical structural with the level in being, it, and cooperates with valve seal by sealing ring in valve body in the cylindrical channel with the level by spring fitting, and the bottom of spool is provided with spool bore; Described spool upper end is provided with flow splitter and back-up ring in turn, and back-up ring is connected with valve body screw thread; During described spring reset, bypass valve is in out the position, and by-pass port is connected with spool bore.
2. by-pass valve of screwdrill according to claim 1, it is characterized in that: described flow splitter is circular ring.
3. by-pass valve of screwdrill according to claim 1 and 2 is characterized in that: described back-up ring is for externally threaded circular ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220594063 CN202882813U (en) | 2012-11-13 | 2012-11-13 | Bypass valve of screw drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220594063 CN202882813U (en) | 2012-11-13 | 2012-11-13 | Bypass valve of screw drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202882813U true CN202882813U (en) | 2013-04-17 |
Family
ID=48074253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220594063 Expired - Fee Related CN202882813U (en) | 2012-11-13 | 2012-11-13 | Bypass valve of screw drill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202882813U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103438244A (en) * | 2013-08-29 | 2013-12-11 | 成都科盛石油科技有限公司 | Bypass valve good in protection |
| CN108166940A (en) * | 2017-12-25 | 2018-06-15 | 中国石油大学(华东) | A kind of by-pass valve of screwdrill and its application method with huge discharge shunting function |
-
2012
- 2012-11-13 CN CN 201220594063 patent/CN202882813U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103438244A (en) * | 2013-08-29 | 2013-12-11 | 成都科盛石油科技有限公司 | Bypass valve good in protection |
| CN108166940A (en) * | 2017-12-25 | 2018-06-15 | 中国石油大学(华东) | A kind of by-pass valve of screwdrill and its application method with huge discharge shunting function |
| CN108166940B (en) * | 2017-12-25 | 2018-11-06 | 中国石油大学(华东) | A kind of by-pass valve of screwdrill and its application method with huge discharge shunting function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130417 Termination date: 20131113 |